Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThrows(IllegalArgumentException.class, () -> converter.convert("xxx"));
  }

  public void testStringConverter_reverse() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThat(converter.reverse().convert(TestEnum.CHEETO)).isEqualTo("CHEETO");

    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThrows(IllegalArgumentException.class, () -> converter.convert("xxx"));
  }

  public void testStringConverter_reverse() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThat(converter.reverse().convert(TestEnum.CHEETO)).isEqualTo("CHEETO");

  public void testStringConverter_nullConversions() {
    assertThat(Longs.stringConverter().convert(null)).isNull();
    assertThat(Longs.stringConverter().reverse().convert(null)).isNull();
  }

  public void testStringConverter_reverse() {
    Converter<String, Long> converter = Longs.stringConverter();
    assertThat(converter.reverse().convert(1L)).isEqualTo("1");
    assertThat(converter.reverse().convert(0L)).isEqualTo("0");